This government site aims to provide up-to-date and accurate information about seasonal flu. There are key facts about the flu, recommendations on what to do if you think you’re sick, info on where to find vaccinations and more.

Number to Know

36 million: The estimated number of trick-or-treaters in 2009 — children 5 to 13 — across the United States. This number is up about 190,000 from a year earlier. Of course, many other children — older than 13, and younger than 5 — also go trick-or-treating. – Census.gov